You only increase on row 1. That will drastically increase the sts, from 82 to 123 or something. Then work all in stockinette (knit on RS, purl on WS) for 14 rows. During that 14 rows you can knit every 4th row in moss stitch as written out on rows 4 and 8, and row 12 would also be done like this. But you can make all the rows stockinette.

Row 14 starts the decreases and they're done on the 4th rows
that are not done in moss stitch. So that's rows 14, 18, 22, and 26 if you need to. In the meantime, continue with the moss stitch if you want on rows 16, 20, and 24.

This is translated from the Swedish so it's not as clear as if it had been in english in the first place. European patterns often translate the WS rows as 'back' rows since they're on the back of the item.